Whether memory will work at a certain speed with a particular individual motherboard and a particular individual processor is dependent upon whether the overall solution generates enough noise that valid data cannot be recognized during data transfers. Noise comes from the processor, from the motherboard, from the DIMMs and from the operational environment. Noise can be greater at specific frequencies as certain devices will naturally generate more noise at frequencies related to their operation. All devices will generate more noise as they age; the system that works initially at some specific frequency may not do so as time passes and lower frequencies will be necessary to continue operation. The motherboard has specific features - trace length matching, termination resistors, etc. - designed into it to help suppress noise. If the overall combination still generates too much noise when run at specific frequencies, the endpoints will not be able to differentiate noise from valid data. When this occurs, failures will occur and the memory bus could even lock up.

In your case, it is obvious that this combination cannot operate at the full 2400MHz speed for these DIMMs. If they are provided, you can try using lesser XMP profiles to determine what frequency can be sustained. Having to back off all the way to 1333MHz would suck, so I hope these interim XMP profiles are included.

I'm owner of this board actually, and I just returned my dead Corsair XMS 3 2000 MHz CAS 9 DIMMs to Corsair support.

They send me back some Dominator Platinium 2400 MHz DIMMs CAS 11.

Like you, I tried XMP 2400 Profile, with no luck.

At SPD speeds (1333 MHz) it's bootable, like you.

So I tried to start from selecting "Profile 1 : XMP-2400" profile, then select "User defined", then I set "Command rate" to "1T" (it's theorically supported on this RAM), and lastly I set my "Memory Multiplier: Speed" to 16 instead of 18.

Even though the Bios shows 1T for the Command Rate, CPUID and my other utilities show 2T.

By any chance did you save the detailed setting for the Dominator Platinum 2400 c9 memory that you had to RMA?

I wonder if those 2400 Profile setting are different from what you are using now.

In order for me to run my 2400 memory at 1600, I had to use the detailed setting from a set of Dominator Platinum 1600 memory that I have. It appears the the setting that the Bios selects for other speeds don't always work, except for 1033.

It makes me think that our memory could run at 2400, if only we knew the right values to select.